Optical Scanning Observation Apparatus Motion Compensation
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Solution Overview
Problem
Optical scanning type observation apparatuses face challenges in efficiently generating high-quality images of objects within body cavies due to limitations in scan patterns and image stabilization, particularly when object motion is significant.
Innovation Solution
The apparatus employs a light source, optical fiber, actuator, and control system to alternately draw first and second spiral-shaped scan routes, generating corresponding images and detecting motion to selectively output frames, ensuring high frame rates during significant motion and preventing pseudo-vibration during minimal motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single scan pattern is used for image acquisition, then the scanning process is simple, but image quality deteriorates when object motion is significant due to inability to stabilize images
Solution Approach 1:
The patent divides the image acquisition process into multiple scan patterns (first scan pattern and second scan pattern) that are alternately executed. Each scan pattern captures images with different spatial sampling, and these segmented acquisitions are later synthesized to produce a stable, high-quality image even when the object is moving
Solution Approach 2:
The patent dynamically switches between different scan patterns based on the imaging requirements and object motion characteristics. The scanning system adapts its behavior by alternating between multiple patterns rather than using a fixed single pattern, enabling real-time adjustment to maintain image quality under varying conditions
2Reliability
If frames are alternately output during large object motion, then pseudo-vibration is prevented, but frame rate may be reduced
Solution Approach 1:
The patent incorporates a motion detection mechanism that monitors object motion between frames and provides feedback to the frame output control. Based on this feedback about motion magnitude, the system intelligently decides whether to alternately output frames (when motion is large) or continuously output frames (when motion is small), thereby maintaining both image stability and high frame rate according to actual conditions
3Productivity
If continuous frame output is used during small motion, then high frame rate is maintained, but pseudo-vibration may occur during large motion
Solution Approach 1:
The motion detection and conditional frame output mechanism uses real-time feedback about object motion to dynamically adjust the frame output strategy. When motion exceeds a threshold, the system switches to alternate frame output to prevent pseudo-vibration; when motion is within acceptable limits, it maintains continuous output for high frame rate, thus adaptively balancing both requirements
4Measurement precision
If multiple scan patterns are alternately used, then image quality is improved through motion compensation, but system complexity increases
Solution Approach 1:
The patent segments the imaging task into multiple scan patterns with different spatial sampling characteristics. By dividing the acquisition process into these distinct patterns and alternately executing them, the system achieves motion compensation and improved image resolution without requiring a single overly complex scanning mechanism
Solution Approach 2:
The patent merges the results from multiple scan patterns through image synthesis processing. By combining the segmented acquisitions from different patterns, the system achieves superior image quality that compensates for motion artifacts, while the merging process is managed through coordinated control of the alternating scan execution
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach stabilizes image quality by alternately outputting frames during large object motion and continuously outputting frames during small motion, preventing pseudo-vibration and maintaining high frame rates, thus enhancing the quality of the movie-like image obtained.
Implementation Method 1
an optical fiber configured to guide the illuminating light incident from an incident end portion connected to the light source portion and emit the illuminating light from an emission end portion to an object, and to allow swinging the emission end portion
Data Source
AI summary
An optical scanning type observation apparatus includes: a light source portion for supplying illuminating light; an optical fiber for guiding the illuminating light and emitting the illuminating light from an emission end portion; an actuator portion for displacing an irradiation position of the illuminating light by swinging the emission end portion; a control portion for controlling the actuator portion such that at least a first frame and a second frame are periodically obtained; an image generating portion for sequentially generating at least a first image in the first frame and a second image in the second frame; a motion detecting portion for detecting a motion of an image between different frames; and an image outputting portion for outputting one or both of the first and second images based on a motion detected by the motion detecting portion.